Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1997-07-18
1999-06-22
Epps, Georgia
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359276, G02F 101
Patent
active
059148020
ABSTRACT:
A light modulator for both intensity and phase modulating coherent light on a pixel-by-pixel basis includes a modulating material responsive to an electric potential for modulating the intensity of coherent light passing through the modulating material, and electrodes for applying an electric potential across the modulating material on a pixel-by-pixel basis. The coherent light associated with a first set of pixels has a different optical path length through the modulating material than does the coherent light associated with a second set of pixels. The modulating material is a liquid crystal material. The electrodes include a set of first reflective pixel electrodes embedded in the liquid crystal material, the first reflective pixel electrodes having a first thickness, and a set of second reflective pixel electrodes embedded in the liquid crystal material, the second reflective pixel electrodes having a second thickness. The coherent light associated with the first set of pixels is reflected by the first reflective pixel electrodes, and the coherent light associated with the second set of pixels is reflected by the second reflective pixel electrodes. The reflective surfaces of the first reflective pixel electrodes are embedded in the liquid crystal material a different amount than are the reflective surfaces of the second reflective pixels. In particular, the first reflective pixel electrodes are a different thickness than the second reflective pixel electrodes.
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Henderson Watson R.
Stappaerts Eddy A.
Anderson Terry J.
Epps Georgia
Hoch Jr. Karl J.
Northrop Grumman Corporation
Woolner John
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